CN113314841A

CN113314841A - Lightning protection structure of antenna

Info

Publication number: CN113314841A
Application number: CN202110780393.2A
Authority: CN
Inventors: 李文博; 肖翔; 阎昱林; 陈小忠
Original assignee: Zhejiang Jinyichang Technology Co ltd
Current assignee: Zhejiang Jinyichang Technology Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-08-27

Abstract

The invention relates to an antenna lightning protection structure, which adopts an upper cover and a lower metal cover to form an antenna shell, wherein a plurality of intercommunicated conductive arms are embedded in the antenna shell, the conductive arms are distributed in the directions of the upper cover body which can be struck by lightning in an equant way, a thickened and widened metal sheet is arranged at the top end of the upper cover body to prevent the conductive arms from being directly damaged by the instantaneous lightning; the metal base is internally provided with a connector coaxially connected with the PCB assembly plate, the antenna lightning protection structure is internally provided with an inner core antenna, and the inner core antenna is fixedly connected with the PCB assembly plate.

Description

Lightning protection structure of antenna

Technical Field

The invention relates to the technical field of antennas, in particular to an antenna lightning protection structure.

Background

In the prior art, for large buildings, antenna equipment and other places, lightning protection measures are basically to use and build an external lightning rod, such as a communication base station and the like, and the lightning protection of small antennas is very lacking. The lightning is not single in the damage mode to modern equipment, and has channels such as space, feeder line, signal, power supply, earth electric counterattack, earth electric recoil, high-level impact of a lightning-falling point and the like, and for an antenna installed outdoors, such as a vehicle-mounted antenna, the height and electromagnetic waves transmitted and received during use of the antenna can greatly increase the possibility of receiving lightning stroke, so lightning protection measures of the small antenna are necessary. In the aspect of the existing small-sized antenna, protective measures such as direct current grounding or lightning arrester connection between the antenna and equipment are basically used; to some active antenna, except adopting the arrester lightning protection, do the lightning protection design to radio frequency circuit in addition, design preparation lightning protection circuit alone promptly, the effect is better, but to the active circuit of stereotyping, design extra lightning protection circuit be not as good as the circuit preparation before turning over, redesign circuit, this can greatly increased engineer's work load and the cost of product, small-size antenna only realizes through single lightning protection antenna to the protective capacities of thunder and lightning simultaneously, the lightning protection effect is comparatively low.

Disclosure of Invention

In order to solve the problems, the invention provides the antenna lightning protection structure which is convenient to install, simple in structure, capable of being directly applied to the existing mature antenna circuit structure and strong in lightning protection effect.

In order to achieve the purpose, the antenna lightning protection structure comprises a combined upper cover, a metal lower cover, an inner core antenna, a connector and a PCB assembly plate, wherein the combined upper cover and the metal lower cover form an antenna shell, the upper part of the metal lower cover is fixedly connected with the PCB assembly plate, and the connector is arranged below the metal lower cover; the PCB assembly board is fixedly connected with the core antenna, and the combined upper cover is provided with a shunt strip structure in an embedded mode. The structure is arranged by directly integrating the shunt strip structure on the antenna shell, the size of the lightning protection necessary component is determined by the internal size of the antenna shell, the structure is simple, the installation is convenient, and the inner core antenna part can adopt antennas of various materials and types.

In order to preliminarily fix the shunt strip structure, the combined upper cover comprises an upper cover body and a lower cover body, the shunt strip structure is connected and communicated with a metal bulge at the top of the middle of the upper cover body, and the lower cover body and the upper cover body are matched with each other to limit and fix the shunt strip structure; the upper cover body is a metal piece, and the lower cover body is a plastic piece. The setting of this kind of structure can carry out preliminary spacing fixedly to fixed reposition of redundant personnel strip structure, goes up the lid and be the metalwork, and the lid is the setting of working of plastics down, can strengthen the lightning protection intensity of going up the lid, can reduce the signal interference of reposition of redundant personnel strip structure to inside antenna simultaneously.

For the efficient effect that reaches the lightning protection, reposition of redundant personnel strip structure from last down constituting in proper order by many electrically conductive arms and support arm, reposition of redundant personnel strip structure switches on in combination upper cover central part phase interconnect, reposition of redundant personnel strip structure by last down walk around PCB assembly board after direct and the metal lower cover meets and switches on from the PCB assembly board outside. The structure enables the shunt strip structure and the conductive arms to be fixed more firmly, meanwhile, the lightning stroke can be conducted in multiple directions through the arrangement of the conductive arms, and meanwhile, the signal interference to the antenna is further reduced.

In order to further achieve an efficient lightning protection effect, the conductive arm and the supporting arm are connected through a bent part, the shunting bar structure is integrally formed into a bent claw shape, and the position of the bent part is matched with the PCB assembly plate on a horizontal plane; the PCB assembly plate on be equipped with the opening that corresponds adaptation kink shape for shunt strip structure wears to establish from the opening part and walks around. The top metal bulges in the middle of the cover body are circumferentially and uniformly distributed by taking the center of a circle in the structure of the plurality of flow dividing strips; the top metal bulges in the middle of the cover body above the shunt strip structure are uniformly distributed in a circle by taking the circle center as a circle center; the height requirement of the conductive arm from the metal bulge at the top of the middle of the upper cover body to the ground is higher than the radiation surface and the ground surface of the antenna. The curved surface of the conductive arm and the curved surface of the upper cover body are equally divided by the arrangement of the structure, so that the strength of lightning stroke is effectively dispersed along the direction of the conductive arm, meanwhile, the width and the height of the conductive arm are increased in a thickening mode, the strength of the conductive arm can be enhanced, the conductivity of the conductive arm is increased on the other hand, and the conductive arm can be directly damaged by the overlarge strength of the lightning stroke through the metal sheet arranged on the upper cover body.

In order to strengthen the intensity and the waterproof performance of antenna case, the antenna case inner wall on be equipped with waterproof rubber ring, the metal arch be with reposition of redundant personnel strip structure integrated into one piece, go up simultaneously on the lid inner wall be equipped with reposition of redundant personnel strip structure complex recess to form the guide post on the outer wall of last lid. This kind of setting can reduce the space between the upper and lower lid through the elastic deformation of electrically conductive arm to promote antenna case's intensity, go up the water conservancy diversion post that sets up on the lid simultaneously, can play the effect of a water conservancy diversion to the rainwater that drops on last lid when the rainfall, the waterproof gasket that sets up on the antenna case inner wall prevents that antenna case is inside to be permeated by the rainwater simultaneously.

The invention relates to an antenna lightning protection structure, which adopts an upper cover and a lower metal cover to form an antenna shell, wherein a plurality of intercommunicated conductive arms are embedded in the antenna shell, the conductive arms are distributed in the directions of the upper cover body which can be struck by lightning in an equant way, a thickened and widened metal sheet is arranged at the top end of the upper cover body to prevent the conductive arms from being directly damaged by the instantaneous lightning; the metal base is internally provided with a connector coaxially connected with the PCB assembly plate, the inner part of the antenna lightning protection structure is provided with an inner core antenna, the inner core antenna is fixedly connected with the PCB assembly plate, the size of a necessary lightning protection component can be determined according to the actual internal size of the antenna shell, and meanwhile, the internal antenna part can adopt antennas made of various materials and types.

Drawings

Fig. 1 is an exploded view of an antenna lightning protection structure.

Fig. 2 is a side cross-sectional view of an antenna lightning protection structure.

Fig. 3 is a top view of an antenna lightning protection structure.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Example 1.

In order to achieve the above purpose, as described in the embodiment shown in fig. 1, the antenna lightning protection structure designed by the present invention includes a combined upper cover 1, a metal lower cover 2, a core antenna 3, a connector 4 and a PCB assembly board 5, wherein the combined upper cover 1 and the metal lower cover 2 form an antenna housing, a waterproof rubber ring 6 is arranged on an inner wall of the antenna housing, the upper part of the metal lower cover 2 is fixedly connected with the PCB assembly board 5, the lower part of the metal lower cover is provided with the connector 4, the PCB assembly board 5 is fixedly connected with the core antenna 3, and the combined upper cover 1 is provided with an embedded shunt strip structure 7.

As shown in fig. 1 and 2, the combined upper cover 1 includes an upper cover body 9 and a lower cover body 10, the shunt strip structure 7 is connected and conducted with a metal protrusion 11 at the middle of the upper cover body 9, the lower cover body 10 is matched with the upper cover body 9 to limit and fix the shunt strip structure 7, a groove matched with the shunt strip structure is arranged on the inner wall of the upper cover body 9, and a flow guide column 12 is formed on the outer wall of the upper cover body 9.

As shown in fig. 1, the shunt bar structure 7 is formed by a plurality of conductive arms 8 and a plurality of support arms 14 in sequence from top to bottom, the shunt bar structure 7 is connected and conducted with each other at the central part of the combined upper cover 1, and the shunt bar structure 7 is directly connected and conducted with the metal lower cover 2 after bypassing the PCB assembly board 5 from the outside of the PCB assembly board 5 from top to bottom.

As shown in fig. 2, the conductive arm 8 and the supporting arm 14 are connected by a bending part 13, so that the shunt strip structure 7 is integrally formed into a curved claw shape, and the position of the bending part 13 is matched with the PCB assembly board 5 on a horizontal plane, and the height of the conductive arm 8 from the metal protrusion 11 at the middle top of the upper cover 9 to the ground is higher than the radiating plane and the ground plane of the antenna.

As shown in fig. 1, 2 and 3, the shunt strip structures 7 are circumferentially and uniformly distributed around a top metal protrusion 11 in the middle of the upper cover body 9; the metal protrusion 11 is integrally formed with the shunt strip structure 7.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an antenna lightning protection structure, includes combination upper cover (1), metal lower cover (2), kernel antenna (3), connector (4) and PCB assembly panel (5), its characterized in that combination upper cover (1) and metal lower cover (2) constitute the antenna shell, metal lower cover (2) top and PCB assembly panel (5) fixed connection, metal lower cover (2) below is equipped with connector (4) simultaneously, PCB assembly panel (5) and kernel antenna (3) fixed connection, combination upper cover (1) on embedded shunt strip structure (7) that is equipped with.

2. The lightning protection structure of an antenna according to claim 1, characterized in that the combined upper cover (1) comprises an upper cover body (9) and a lower cover body (10), the shunt strip structure (7) is connected and conducted with the metal bump (11) at the middle top of the upper cover body (9), and the lower cover body (10) is matched with the upper cover body (9) to limit and fix the shunt strip structure (7).

3. The lightning protection structure of an antenna according to claim 1, characterized in that the shunt bar structure (7) is composed of a plurality of conductive arms (8) and supporting arms (14) in sequence from top to bottom, the shunt bar structure (7) is connected and conducted with each other at the central part of the combined upper cover (1), and the shunt bar structure (7) is directly connected and conducted with the metal lower cover (2) after bypassing the PCB assembly board (5) from the outside of the PCB assembly board (5) from top to bottom.

4. An antenna lightning protection structure according to claim 3, characterized in that the conductive arm (8) and the supporting arm (14) are connected by a bending part (13) and the shunt strip structure (7) is formed into a curved claw shape, and the bending part (13) is located to match the PCB mounting board (5) in a horizontal plane.

5. The lightning protection structure of antenna according to claim 4, wherein the PCB assembly board (5) has an opening corresponding to the shape of the adapting bending portion (13), so that the shunt strip structure (7) is passed through the opening.

6. An antenna lightning protection structure according to claim 3, characterized in that the shunt strip structures (7) are circumferentially and uniformly distributed around the center of the top metal bulge (11) in the middle of the upper cover body (9).

7. A lightning protection structure for antenna according to claim 3, characterized in that the height of the conductive arm (8) from the metal bump (11) at the top of the middle of the upper cover (9) to the ground is higher than the radiating plane and the ground plane of the antenna.

8. An antenna lightning protection structure according to claim 2, characterized in that the metal bump (11) is formed integrally with the shunt strip structure (7).

9. An antenna lightning protection structure according to claim 1, characterized in that a waterproof gasket (6) is arranged on the inner wall of the antenna housing.

10. The lightning protection structure for antenna according to claim 2, characterized in that the inner wall of the upper cover (9) is provided with a groove matching with the shunt strip structure, and the outer wall of the upper cover (9) is formed with a flow guiding column (12).